911 Speed Chronograph Watch WAP07000016 Exclusive chronograph with variable aggregate with 12-hour, 30-minute and 60-second counters. Tachymeter for measuring speed over given distance. Luminescent hour-hand, minute-hand and counters. Solid stainless steel case with double-coated sapphire glass. Sporty, durable synthetic strap with tire tread pattern on the inside. Quartz movement. Water-resistant to 100 meters. Swiss-made. Diameter: 1 2/3 in. (42 mm).